instance metadata: add support for Alibaba Cloud

node/metadata/alibaba.go

@@ -0,0 +1,43 @@
+package metadata
+
+import (
+	"io"
+	"net/http"
+
+	"k8s.io/klog/v2"
+)
+
+const alibabaInstanceMetadataURL = "http://100.100.100.200/latest/meta-data/"
+
+func getAlibabaMetadata() *CloudMetadata {
+	var lastErr error
+	getVar := func(path string) string {
+		r, _ := http.NewRequest(http.MethodGet, alibabaInstanceMetadataURL+path, nil)
+		resp, err := httpCallWithTimeout(r)
+		if err != nil {
+			lastErr = err
+			return ""
+		}
+		defer resp.Body.Close()
+		data, err := io.ReadAll(resp.Body)
+		if err != nil {
+			lastErr = err
+			return ""
+		}
+		return string(data)
+	}
+	res := &CloudMetadata{
+		Provider:         CloudProviderAlibaba,
+		InstanceId:       getVar("instance-id"),
+		Region:           getVar("region-id"),
+		AvailabilityZone: getVar("zone-id"),
+		AccountId:        getVar("owner-account-id"),
+		InstanceType:     getVar("instance/instance-type"),
+		LocalIPv4:        getVar("private-ipv4"),
+	}
+	if lastErr != nil {
+		klog.Warningln(lastErr)
+		return nil
+	}
+	return res
+}

node/metadata/metadata.go

@@ -20,6 +20,7 @@ const (
 	CloudProviderAzure        CloudProvider = "Azure"
 	CloudProviderHetzner      CloudProvider = "Hetzner"
 	CloudProviderDigitalOcean CloudProvider = "DigitalOcean"
+	CloudProviderAlibaba      CloudProvider = "Alibaba"
 	CloudProviderUnknown      CloudProvider = ""
 )
 
@@ -55,8 +56,11 @@ func getCloudProvider() CloudProvider {
 		}
 	}
 	if vendor, err := os.ReadFile("/sys/class/dmi/id/sys_vendor"); err == nil {
-		if strings.TrimSpace(string(vendor)) == "Hetzner" {
+		switch strings.TrimSpace(string(vendor)) {
+		case "Hetzner":
 			return CloudProviderHetzner
+		case "Alibaba Cloud":
+			return CloudProviderAlibaba
 		}
 	}
 	return CloudProviderUnknown
@@ -76,6 +80,8 @@ func GetInstanceMetadata() *CloudMetadata {
 		return getHetznerMetadata()
 	case CloudProviderDigitalOcean:
 		return getDigitalOceanMetadata()
+	case CloudProviderAlibaba:
+		return getAlibabaMetadata()
 	}
 	return nil
 }